Triangle read by rows: T(n,k) is the coefficient of x^k in the polynomial p[n,x] defined by p[ -1,x]=0, p[0,x]=1, p[1,x]=-x, p[n,x]=x*p[n-1,x]-(n-1)*p[n- 2,x]+(n-2)*p[n-3,x] for n>=2 (0<=k<=n).
A123730
Triangle read by rows: T(n,k) is the coefficient of x^k in the polynomial p[n,x] defined by p[ -1,x]=0, p[0,x]=1, p[1,x]=-x, p[n,x]=x*p[n-1,x]-(n-1)*p[n- 2,x]+(n-2)*p[n-3,x] for n>=2 (0<=k<=n).
Terms
- a(0) =1a(1) =0a(2) =-1a(3) =-1a(4) =0a(5) =-1a(6) =1a(7) =1a(8) =0a(9) =-1a(10) =3a(11) =-1a(12) =4a(13) =0a(14) =-1a(15) =-7a(16) =-1a(17) =-4a(18) =8a(19) =0a(20) =-1a(21) =-11a(22) =2a(23) =-21a(24) =-8a(25) =13a(26) =0a(27) =-1a(28) =57a(29) =-10
External references
- oeis: A123730